<html><body><h1>Whitelabel Error Page</h1><p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p><div id='created'>Mon Oct 14 21:58:27 CST 2019</div><div>There was an unexpected error (type=Internal Server Error, status=500).</div><div>Could not write JSON: No serializer found for class com.pactera.ijep.service.hk.entity.User and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class com.pactera.ijep.service.hk.entity.User and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.HashMap[&quot;data&quot;]-&gt;java.util.Arrays$ArrayList[0])</div></body></html>